nucleole

Thesaurus

Noun

1.

nucleole - a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesisnucleoluscell nucleus, karyon, nucleus - a part of the cell containing DNA and RNA and responsible for growth and reproductioncell organ, cell organelle, organelle - a specialized part of a cell; analogous to an organ; "the first organelle to be identified was the nucleus"